diff --git a/pdk/README b/pdk/README
index 036912d..229db43 100644
--- a/pdk/README
+++ b/pdk/README
@@ -58,9 +58,9 @@
   python <path_to_appengine_installation>/dev_appserver.py --address 0.0.0.0 \
     <path_to_cupcake_code>/android/out/target/common/docs
     
-To verify it is working you can access it with a browser loacally on port 8080:
+To verify it is working you can access it with a browser locally on port 8080:
 
-http://localhost:8080/index.html
+http://localhost:8080/online-pdk/guide/index.html
 
 NOTE: If you are trying to get to the appengine local testing instance remotely
 you will have to ssh tunnel into your linux box as appengine only serves the web
diff --git a/pdk/docs/guide/build_new_device.jd b/pdk/docs/guide/build_new_device.jd
index 2e2b367..895ed3d 100755
--- a/pdk/docs/guide/build_new_device.jd
+++ b/pdk/docs/guide/build_new_device.jd
@@ -11,6 +11,7 @@
 <ul>
 <li><a href="#androidOHDPortingDeviceBuildingProcess">Detailed Instructions</a></li>
 <li><a href="#androidBuildNewFileTree">New Product File Tree</a></li>
+<li><a href="#androidBuildSystemProductDefFiles">Product Definition Files</a></li>
 </ul>
 </div>
 </div>
@@ -18,7 +19,7 @@
 
 <a name="androidOHDPortingDeviceBuildingProcess"></a><h3>Detailed Instructions</h3>
 
-<p>The directions below describe how to configure make files for new mobile devices and products.</p>
+<p>The steps below describe how to configure makefiles for new mobile devices and products running Android.</p>
 <ol>
   <li>Create a company directory in <code>//vendor/</code>.<br/>
   <pre class="prettyprint">
@@ -26,13 +27,15 @@
   <li>Create a <code>products</code> directory beneath the company directory you created in step 1.<BR>
   <pre class="prettyprint">
   mkdir vendor/&lt;company_name&gt;/products/</pre></li>
-  <li>Create a product-specific make file, called <code>vendor/&lt;company_name&gt;/products/&lt;first_product_name&gt;.mk</code>, that includes the following code:<BR>
+  <li>Create a product-specific makefile, called <code>vendor/&lt;company_name&gt;/products/&lt;first_product_name&gt;.mk</code>, that includes at least the following code:<BR>
     <pre class="prettyprint">
   $(call inherit-product, $(SRC_TARGET_DIR)/product/generic.mk)
   #
   # Overrides
   PRODUCT_NAME := &lt;first_product_name&gt;
-  PRODUCT_DEVICE := &lt;board_name&gt;</pre></li>  
+  PRODUCT_DEVICE := &lt;board_name&gt;</pre>
+  Additional product-specific variables can be added to this <a href="#androidBuildSystemProductDefFiles">Product Definition</a> file. 
+  </li>  
   <li>In the <code>products</code> directory, create an <code>AndroidProducts.mk</code> file that point to (and is responsible for finding) the individual product make files.<BR>
   <pre class="prettypring">
   #
@@ -51,7 +54,7 @@
   <li>Create a board-specific directory beneath your company directory that matches the <code>PRODUCT_DEVICE</code> variable <code>&lt;board_name&gt;</code> referenced in the product-specific make file above. This will include a make file that gets accessed by any product using this board.<BR>
   <pre class="prettyprint">
   mkdir vendor/&lt;company_name&gt;/&lt;board_name&gt;</pre></li>
-    <li>Create a <code>product_config.mk</code> file in the directory created in the previous step (<code>vendor/&lt;company_name&gt;/&lt;board_name&gt;</code>). If this directory does not include a <code>product_config.mk</code> file, the build will fail.<BR>
+    <li>Create a <code>BoardConfig.mk</code> file in the directory created in the previous step (<code>vendor/&lt;company_name&gt;/&lt;board_name&gt;</code>). <BR>
   <pre class="prettyprint">
   # These definitions override the defaults in config/config.make for &lt;board_name&gt;
   #
@@ -71,7 +74,7 @@
   PRODUCT_MAKEFILES := \
     $(LOCAL_DIR)/first_product_name.mk \
     $(LOCAL_DIR)/second_product_name.mk</pre></li>
-  <li><code>vendor/&lt;company_name&gt;/&lt;board_name&gt;</code> must include an <code>Android.mk</code> file with at least the following code:<BR><BR>
+  <li>An <code>Android.mk</code> file must be included in <code>vendor/&lt;company_name&gt;/&lt;board_name&gt;</code> with at least the following code:<BR>
   <pre class="prettyprint">
   # make file for new hardware <board_name> from <company_name>
   #
@@ -94,7 +97,10 @@
   include $(CLEAR_VARS)
   #
   # include more board specific stuff here? Such as Audio parameters.      
-  #</pre></li>
+  #</pre>
+  
+  Additional Android.mk parameters 
+  </li>
 <li>To create a second product for the same board, create a second product-specific make file called <code>vendor/company_name/products/&lt;second_product_name&gt;.mk</code> that includes:<BR>
 <pre class="prettyprint">
   $(call inherit-product, $(SRC_TARGET_DIR)/product/generic.mk)
@@ -231,73 +237,4 @@
 
 </pre>
 
-<a name="androidBuildVariants"></a><h3>Build Variants</h3>
 
-<p> 
-When building for a particular product, it's often useful to have minor
-variations on what is ultimately the final release build.  These are the
-currently-defined build variants:
-</p> 
- 
-<table border=1> 
-<tr> 
-    <td> 
-        <code>eng<code> 
-    </td> 
-    <td> 
-        This is the default flavor. A plain "<code>make</code>" is the
-        same as "<code>make eng</code>".  <code>droid</code> is an alias
-        for <code>eng</code>.
-        <ul> 
-        <li>Installs modules tagged with: <code>eng</code>, <code>debug</code>,
-            <code>user</code>, and/or <code>development</code>.
-        <li>Installs non-APK modules that have no tags specified.
-        <li>Installs APKs according to the product definition files, in
-            addition to tagged APKs.
-        <li><code>ro.secure=0</code> 
-        <li><code>ro.debuggable=1</code> 
-        <li><code>ro.kernel.android.checkjni=1</code> 
-        <li><code>adb</code> is enabled by default.
-    </td> 
-</tr> 
-<tr> 
-    <td> 
-        <code>user<code> 
-    </td> 
-    <td> 
-        "<code>make user</code>"
-        <p> 
-        This is the flavor intended to be the final release bits.
-        <ul> 
-        <li>Installs modules tagged with <code>user</code>.
-        <li>Installs non-APK modules that have no tags specified.
-        <li>Installs APKs according to the product definition files; tags
-            are ignored for APK modules.
-        <li><code>ro.secure=1</code> 
-        <li><code>ro.debuggable=0</code> 
-        <li><code>adb</code> is disabled by default.
-    </td> 
-</tr> 
-<tr> 
-    <td> 
-        <code>userdebug<code> 
-    </td> 
-    <td> 
-        "<code>make userdebug</code>"
-        <p> 
-        The same as <code>user</code>, except:
-        <ul> 
-        <li>Also installs modules tagged with <code>debug</code>.
-        <li><code>ro.debuggable=1</code> 
-        <li><code>adb</code> is enabled by default.
-    </td> 
-</tr> 
-</table> 
- 
-<p> 
-If you build one flavor and then want to build another, you should run
-"<code>make installclean</code>" between the two makes to guarantee that
-you don't pick up files installed by the previous flavor.  "<code>make
-clean</code>" will also suffice, but it takes a lot longer.
-</p> 
- 
\ No newline at end of file
diff --git a/pdk/docs/guide/build_system.jd b/pdk/docs/guide/build_system.jd
index 64216d8..4b29202 100755
--- a/pdk/docs/guide/build_system.jd
+++ b/pdk/docs/guide/build_system.jd
@@ -12,6 +12,7 @@
 <li><a href="#androidBuildSystemLayers">Layers</a></li>
 <li><a href="#androidSourceSetupBuildingCodeBase">Building the Android Platform</a></li>
 <li><a href="#androidSourceSetupBuildingKernel">Building the Android Kernel</a></li>
+<li><a href="#androidBuildVariants">Build Variants</a></li>
 </ul>
 </div>
 </div>
@@ -108,6 +109,8 @@
 % make -j4 PRODUCT-generic-eng
 </pre>
 
+<p>These <a href="#androidBuildVariants">Build Variants</a> differ in terms of debug options and packages installed. 
+ 
 
 <a name="androidBuildingCleaning"></a><h4>Cleaning Up</h4>
 
@@ -194,4 +197,73 @@
 <p>To build the kernel, execute:</p>
 <pre class="prettyprint">
 % make -j4
-</pre>
\ No newline at end of file
+</pre>
+
+<a name="androidBuildVariants"></a><h3>Build Variants</h3>
+
+<p> 
+When building for a particular product, it's often useful to have minor
+variations on what is ultimately the final release build.  These are the
+currently-defined build variants:
+</p> 
+ 
+<table border=1> 
+<tr> 
+    <td> 
+        <code>eng<code> 
+    </td> 
+    <td> 
+        This is the default flavor. A plain "<code>make</code>" is the
+        same as "<code>make eng</code>".
+        <ul> 
+        <li>Installs modules tagged with: <code>eng</code>, <code>debug</code>,
+            <code>user</code>, and/or <code>development</code>.
+        <li>Installs non-APK modules that have no tags specified.
+        <li>Installs APKs according to the product definition files, in
+            addition to tagged APKs.
+        <li><code>ro.secure=0</code> 
+        <li><code>ro.debuggable=1</code> 
+        <li><code>ro.kernel.android.checkjni=1</code> 
+        <li><code>adb</code> is enabled by default.
+    </td> 
+</tr> 
+<tr> 
+    <td> 
+        <code>user<code> 
+    </td> 
+    <td> 
+        "<code>make user</code>"
+        <p> 
+        This is the flavor intended to be the final release bits.
+        <ul> 
+        <li>Installs modules tagged with <code>user</code>.</li>
+        <li>Installs non-APK modules that have no tags specified.</li>
+        <li>Installs APKs according to the product definition files; tags
+            are ignored for APK modules.</li>
+        <li><code>ro.secure=1</code> </li>
+        <li><code>ro.debuggable=0</code> </li>
+        <li><code>adb</code> is disabled by default.</li>
+    </td> 
+</tr> 
+<tr> 
+    <td> 
+        <code>userdebug<code> 
+    </td> 
+    <td> 
+        "<code>make userdebug</code>"
+        <p> 
+        The same as <code>user</code>, except:
+        <ul> 
+        <li>Also installs modules tagged with <code>debug</code>.
+        <li><code>ro.debuggable=1</code> 
+        <li><code>adb</code> is enabled by default.
+    </td> 
+</tr> 
+</table> 
+ 
+<p> 
+If you build one flavor and then want to build another, you should run
+"<code>make installclean</code>" between the two makes to guarantee that
+you don't pick up files installed by the previous flavor.  "<code>make
+clean</code>" will also suffice, but it takes a lot longer.
+</p> 
\ No newline at end of file
diff --git a/pdk/docs/guide/sensors.jd b/pdk/docs/guide/sensors.jd
index 79a2ad3..02f0c4e 100755
--- a/pdk/docs/guide/sensors.jd
+++ b/pdk/docs/guide/sensors.jd
@@ -32,13 +32,30 @@
 <a name="androidSensorBuildingDriver"></a><h3>Building a Sensor Library</h3>
 <p> To implement a Sensors driver, create a shared library that implements the interface defined in <code>sensors.h</code>. You must name your shared library 
 <code>libsensors.so</code> so that it will get loaded from <code>/system/lib</code> at runtime. 
-</p
+</p>
 
+<p> The following stub <code>Android.mk</code> file ensures that <code>libsensors</code> compiles and links to the appropriate libraries:</p>
+<pre>
+LOCAL_PATH := $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := sensors
+
+LOCAL_PRELINK_MODULE := false
+
+LOCAL_MODULE_PATH := $(TARGET_OUT_SHARED_LIBRARIES)/hw
+
+LOCAL_SHARED_LIBRARIES := liblog
+# include any shared library dependencies
+
+LOCAL_SRC_FILES := sensors.c
+
+include $(BUILD_SHARED_LIBRARY)
+</pre>
  
 <a name="androidSensorsInterface"></a><h3>Interface</h3> 
  
  
- 
 <p><span class="lh3"><a name="androidDoxygenNote"></a></span> 
  
 <p class="note"><strong>Note</strong>: This document relies on some Doxygen-generated content that appears in an iFrame below. To return to the Doxygen default content for this page, <a href="sensors.html">click here</a>.</p>